3. Label images
Last updated
Last updated
Click an image to enter the labeling interface. To zoom, press CTRL while using the mouse wheel to scroll up or down. To pan the image, press CTRL while clicking and dragging with your mouse.
Click the box icon on the left menu to start labeling boxes. Next, select the right object category using the drop-down menu on the left. To start labeling, press once in the top-left corner of an object, and once more in the bottom-right corner of each object. You will notice that for each object you label, an entry will appear in the objects tab on the right.
To stop labeling, either press ESC, or click on the mouse button icon in the left menu.
To save your progress, click the save icon.
To modify a labeled object, select the box by clicking on it (make sure the mouse icon in the left menu is selected). Next, the box can be moved/resized or assigned to a different class. If you want to get rid of the box, you can press ‘delete’ when selected, or you can delete it by clicking on the trashcan icon in the objects tab.
To label objects with a mask (for instance segmentation), you can use either the paintbrush to color in the object or use the polygon tool. Both tools can be used interchangeably, so one might use the polygon tool to mask a rough contour and use the brush tool to finetune some borders.
To use the brush tool, click the brush icon in the left menu. Select the right object category in the drop-down menu in the top left. By scrolling your mouse wheel up or down, you can increase or decrease the radius of the brush. Click and drag to start drawing. Click the gum icon to erase. Once satisfied, press the SPACE bar to confirm the mask. You should see an entry appear in the objects tab to the right.
For convex objects, it's easier to use the polygon tool. This way, you can't have to fill in the center. To use the polygon tool, click on the polygon icon in the left menu. Select the right object category in the drop-down menu in the top left and start setting points on the object's contour. To close the polygon, click back on the first point. Once satisfied, press the SPACE bar to confirm the mask. You should see an entry appear in the objects tab to the right.
